Automatic hydraulic pump.



No. 886,379. 7 I PATENTHED MAY 5, 1908. v I

L. A. LAURSEN. AUTOMATIC HYDRAULIG PUMP.

APPLICATION FILED 0O'1.21, 1907.

2 SHEBTSSHEET l.

' Q/vihmono 4 I 3 Elmucznlicr abbomwga No. 886,379. PATENTED MAY 5, 1908.'

L. A. LAURSEN.

AUTOMATIC HYDRAULIC PUMP.

APPLICATION rump 00121, 1907.

atbo'anugd LAURITS AKSEL LAURSEN, OF CORNELL, WISCONSIN.

no'rouirzc HYDRAULIC Pour. 7

Specification of Letters Patent.

Patented May 5, 1908.

Application filed October 21, 1907. Serial No. 398,897.

To all whom it may concern: v

' Be it known that I, LAURITS AKsEL LAURSEN, a citizen of the United States, residi at Cornell, in the county of Chip ewa' and tate of Wisconsin, have invented certain. new'and useful Improvements in Automatic Hydraulic Pumps, of which the followingris aspecification. I a hisinvention relates to improvements in hydraulic pumps.

The ob ect of theinvention is to provide an automatic pump of the above type which may be placed at any 1point in ariver or creek, and so connected wit the water, supply as to admit of operation of the pump by a comparatively small head of water, so as to elevate'watera considerable distance'dependent upon the head aforesaid. I I

In the practical operation of the invention the head of water sufiicient toefiect auto- -matic operation of the pump comprising this invention may be secured in any of the various \Ways commonly employed in hydraulic engineering and the construction of the pump is of greatadvan'tagebecause of the power which is derived in its operation whereby water is elevated a'considerable distance in the manner above premised. Of course it will be understood that the invention may be used for various pur oses, as on a farm or T1nother places accor 'ng to the necessities arising under actual conditions of service.

For a full understanding of the invention,

includingitsadvant es and mode of operation, reference is to e had to the accompanying drawings, in which:- y

Figure 1 is a view showing the main operating parts of the machine in vertical section, otherarts being shown in elevation, and

0 embo ying the preferred form of the invention. Fig.- 2 is a view similar to 1, a modification of the invention being illus "trated, and certain parts of the invention shown in Fig. 1 being in reversed positions.

Fig. 3 is a detail view of the slide valve. Fig. 4 is a horizontal sectional view taken on the line 44 oLFig. 1 looking-downwardly. Fig. 5 is a detail-view of the piston otthe working cylinder. 1

Similar'parts are referred to in all the views ofuthe drawings, and indicated in the descripti on by the same reference characters.

Specifically describing the invention and referring to -the-drawings','the numeral ldes- -5 ignates a supply pipe which is connected with the watersupply by which the pump is o erated, in any suitable manner.

The supranc 2 into a discharge cylinder 3, in which operates a discharge piston 4.. The upper end of the cylinder 3 is open and is connected by suitable fastenings with the lower end of a working cylinder 5 at the upper end of which is provided an air compartment or chamber 6 which-comprises a head 7 detachably secured to the cylinder 5, as shown at 8. The piston rod 9 of the piston 4 is of many sided y pipe 1 leads at its lower end by a vertical orm, preferably square, in'cross section, and

passes through an openi of similar form provided in a guide mem er 10 which extends across the upper .open end of the cylinder 3. Thepiston 4 is thus held from rotation by the cooperation of the member 10 with its piston rod. The piston rod 9 is con-. nected at its upper end with a working piston 11 operating in the cylinder 5 and havin the piston rod 12 extending upwardly there om 1n a central arrangement in said cylinder 5.

. Mounted upon the upper end portion of the 2 rod 12 are vertically spaced upper and lower engaging members 13 and 14 respectively,

said members comprising transverse supplplrts applied to the rod 12 and having anti- 'ction rollers 13 and 14mounted upon 0 posite ends and upon opposite sides of t 1e rod. The rod 12 asses through a yoke 15 which, constitutes t e upper arm of a rocking lever 16, the latter being pivoted to a detachable supporting member 17 secured to the cylinder 5. The yoke 15 receives the rod 12 at that portion of the latter between the two engaging members 13 and 14, the said engagmembers being adapted to engage the" yoie in the up and down movement of the member 12 actuated by movement of the working iston '11. The, piston. 11 is also prevente from rotation bythe co6perating guide member 10 and rod 9. The lowerarm of the lever 16 has loose connection at 18 with a valve rod 19 which is arranged for horizontal movement in a casing or water chest 20. v The valve casing 20 is attachedat one end to a side of the c linder 5 and the end portion of the rod- 19 which is connected with the lever 16- preferably passes throughxa stuffing box 21. 4 Connected with the valve rod 19 for operation thereby is a slide valve 22 which controls the opening and closing of waste and supply ports 23 and 24 respectively, the-latter belng provided in the lower portionof the casi-n =20. Asupply pipe 25 ads from the supp y port 24into the cylinder-5..atan intermediate point in the length of 'saidcylinder. A waste ipe 26 is connected at one end of'the' cy inder at thebottom of the latter and leads upwardly to a point adj acent to the waste port 23 the up er end of said pipe 26 being flared to prov1 e a I funnel-like outlet 27. Thwaste port 23 is arranged 'just above the outlet 27 and .is spaced therefrom as shown most clearly in t e drawings. Leading off from the main V supply pipe 1 is a branch supply pipe 28 which sand tra nected t erewith w ereby the trap maybe 1s connectedatthe upper portion of the easing 20, which casing as above mentioned virtually constitutes a Water chest. In the length of the branch pipe 28 is interposed a 29 havin a suitable cock 30 conflushed and cleansed as occasion may requlre.

At a suitable point in the length of the main supply-pipe 1 is located a check valve 31 opening in the direction of the arrow. The i e 1 extends some distance beyond the vertlca branch 2 thereof and thenceupwardly as shown at 1* to its point of connection with The 7 an air and water dome or reservoir 32. reservolr 32 may be situated some distance .away from the parts of the mechanism besuch valves being employed to control the passage of water through the several elements of the structure, as for instance when repairing or repacking the pistons, &c. The pipe 33 terminates adjacent to a sink 33 or tie like, and is provided with a cock or faucet 33 by virtue of which the flow of water and the ordinary operation of the pump are controlled. I

'Describing the general operation of the invention, all parts being assembled and in normal position, water passes from the sup ply" ipe 1 to .the cylinder 3, opening tie chec valve 31. Thepressure of the water against the under side of the piston 4 forcesthe said piston and the piston 11 upwardly.

As the plston 11 apprdaches the limit of'its 'upward movement, the engaging member 14 itsrod 12 strikes the yoke 15 and tilts the lever-16 swinging the weighted arm 16 he yond the. dead center whereupon the weight will uickly and forcibly move the valve 22 into the position in which it is shown in Fig. 1

,ofthe drawings, wherein the simple form of- '60 be in such a position as to open the supply 5 ort 24 to-the Waterjchest 20. a The water. BY

the invention is illustrated. In other words when-the istons '4 and 11 are at the upper limits of t eir movements the valve 22 will rom the branch supply pipe '28 then ply through the-pipe- 25 into the cylinder5,

the cylinder will fil with water above piston 11 causing the air confined therein to be compressed. The air thus compressed will have an expansive force substantially equalto the force of the water acting upon the up er side of the piston 11, and such force of t e confined air will be maintained substantially uniform during the admission of water through the pipe 25. I

As the piston 11 approaches the-limit of its downward movement themember 13 on the rod 12 strikes the yoke 15 and the tilting of the lever 16 will cause the valve 22 to resume the position in which it is shown in Fig. 2, whereby the supply port 24 is closed permitting the pressure of the water from the main supply p pel upon the bottom of the piston 4 to force the pistons upwardly again, said pressure exceeding the pressure exerted by the weight of the water upon the top of the piston 11. When the port 24 is closed of course the supply of water exerting a pressureu'pon a top of the'piston has been cut off. In the gradual movement of the valve I 22 closingthe port 24, on the down stroke of the piston 11 it will be apparent that at a certain point the .water passing into the supply pipe 25'will be so reduced in volume that the difference between the areas of the pistons 11 and 4 will not be'suflicient to cause continued downward movement of the pistons, by reason of the resistance oil'ered by the water entering the lower end of the cylinthe air chamber 6 is su flicient to cause the small final.moveme1 1tof-the pistons 11 and 4 suflicient to draw ,the valve 22 clear over the port 24 and permit waste the port 23, whether-or not the weighted arm 16; is used for the purpose of shifting-the valve 22 over port 24.

The upward and downward strokes of the istons 4 and 11 havebeen described above min the starting of the .mechanism. Now

011 the next u 'ward'stroke of the istons, the I water above t e-piston 11 will be orced from the sup 'ly pipe 25 through the p'o'rt' 24 and out of t e casing 20 through the waste port .23. This water will lpassinto, the p pe26.

sac,

and from thence into the cylinder below the piston 11 and will by virtue of the buoyant iorce of the column of water in the vertical portion of pi e 26 augmented by'the jet of waterthroug the port 23 due to the expan sive force ofthe air previously com ressed within the chamber 6 assist in the li ting of the istons caused by the pressure of the Water om the main supply pi e 1 against the 'underside of the iston 4. W hen the piston 11 has reached t e u' er limit of its movement the valve 22 W5 have been moved so as to open the suppl port- 24 permitting water to again enter t e cylinder 5 above the piston 11 and the stroke of the piston will be reversed -As the piston 11 moves down the .water in the cylinder 5 below said piston will be forced into the waste pipe 26 and will ass from the outlet 27 before described, this appening at each downward stroke of the piston 11. I I

On the down stroke of thepistons. 11 and 4, the piston 4 will force the water belowthe. same in the cylinder 3 downwardly into the pipe 1, closing the checkvalve 31. Said water will then be discharged from the cylinder 3 into the reservoir 32 and when the air in the reservoir 32 is compressed to a certain degree, thewater will of course be discharged through the discharge pipe 33, the latter leading off to an elevated point which is to be supplied by theiwater forcedupwardly by means of the hydraulic pump.

' Fig. 2 o1" the drawings illustrates a modified form of theinvention which is particularly designed for elevating water to great heights when only asmall head of .water is sup ied to the umping mechanism. vThe mo ification of t e invention is secured advantageously by em loying an attachment which may be readi y applied tothe more simple form of the invention illustrated in Fi 1. lDescribing'the modification it'will be ob-. served that an auxiliar working cylinder 36 is provided, the same eing arranged below and attached in a substantial manner to the lower end of the discharge cylinder 3.- With in the auxiliary cylinder 36 operates an auxiliary iston 37 having its piston rod 38 at tache t0 the discharge piston 4, said rod 38 passing through a ,stufiingbox'39 at the up per end of the cylinder 36, the two cylinders 3 and 36 being entirely separate and inde-' pendent so far as the mclosed chambers or [spaces thereof are concerned. I Connected with the lower end of the cylinder 36 is an auxiliary supplly pipe 40"whi ch is also corn nected with t e casmgliorlwater chest'20 at the lower portion 5f,f theflatter, an auxiliary supply port 41 being located at the point of connectionofthefpipe 40 and casing 20. The arrangementof'the port-AI is such that in the operation of the pumping mechanism (i5 1 wh h ttachment is applied, the valve mp P g 22 Will control the opening and closing of the port 41 in a sim le and advantageous manner. Theprovislon in the auxiliary cylinder 36 of. the auxiliarypiston 37, of a considerable area will be effective in forcing the pistons 4 and 11 to the limit of their upward,n1ovement, when if the piston 37 were not used, the comparatively small head of water supplied to the pumping mechanism would not cause elevation of the water a suflicient distance. Inother words .by the addition of the attachment modifying the operation of the invention, the same head of water which elevates watera certain distance, in the operation of the invention shown in Fig. 1 will elevate water a far greater distance in the operation of the mechanism illustrated in. Fig. 2due to the working area of the piston 37 which acts auxiliary to the iston 4 in the lifting of the pistons to the imits of their tion it will be apparent that u on the downward stroke'of the p'mtons in t e form of the invention shown in Fig. 2, the supply port 24 will be closed and theiwater'below the; piston 11 will waste through waste pipe 26. and outlet 27. After the pistons have reached the lower limits of their movement and the port 24 has been closed, the valve 22 will be so arranged thatvthe auxiliary port 41 is open and the istons will he forced upwardly not only by t e pressure of the water frorn'the main e 1 against the underside of the piston 4 ut by the pressure "of the water passing from the water chest 20 into the pipe 40 and against the lower side of the piston '37 in the cylinder 36. It will be obvious that by increasing or decreasing the siz'e of the cylinder 36 and piston 37 used as an attach- 'ment for the'more simple form of my mech anism,- the proper capacity of'the machine may be determined. U

' From the fore oing descriptipn it will be understood that or the elevation of water to. a highelevation relative to the source, it isrequisite that the working piston .li must have a surface area proportionately greater than that of the discharge piston 4. If then it be reguired to elevate toan exceedingly high point and with onlyfa low'head the working piston' would have to heme e so large in proportion to the piston 4 that the said piston 11 to its-upper limit of movement in a practical manner, hence in such a case the auxiliary mechanism of Fig. 2 is utilized to assist the piston 4 to lift-an excessively lar epistonll. I orderior the head/7 to have sufficient capacity to accommodate the weighted arm 16f its oscillations, I may prev-ide an exportion of thel i ea'd in any-suitable manner, or. in Smile cases it may be preierged to. so

proportiontheii main parts 'as.to not require 8'5 upward movements. In the actual opera- ,latter alone would be inadequate to restore "tension 7 and attach the same tothe main building or elsewhere to which the normal pressureof the source would be inadequate to supply. In general terms the height of the l a After the valve 33 is closed the pump will head or source (or main pressure) bears the same ratio to the elevation of the point supplied as the area of the discharge piston 4 ears to the area of the working piston 11. The machines will, therefore, be constructed to meet the. necessities of the various requirements as to the work to be performed.

continue to operate until the dome or reservoir 32 becomes charged with waterand the air contained therein is compressed to the limit of the capacity of the pump. The force of the air t'ius confined will be exerted to immediately discharge water upwardly through the pipe 33 when the valve 33 is again opened. serves not only in the sense of a storage chamber but also to render the flow of water practically steady during continuous operation of the pump. It will also be noted that if the pump belocated at the foot of a dam or well, when the outlet valve 33 is closed the water in said dam or well will rise to a higher level, so that the force or capacity of the pump will be correspondinglyincreased. By virtue of this arrangement a more economical machine may be employed, '5. e.', one with a less differential between the discharge and working pistons.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent of the United States, is

1. In an automatic pump, the combination of the working cylinder 5 and its piston 11, the discharge cylinder 3 and its piston 4, a valve casing having a Waste port 23, the waste pipe 26 connected with the working cylinder 5 and having the outlet 27 below said waste port and being spaced therefrom, the

supplg pipe 25 connecting the casing and cylin er 5 the valve 22, movable in the valve casing to connect pipes 25 and 26 on theupstroke of piston ll so-that the pressure medium will be forced from one side of saidjpiston to the other side, and also movable into. a

position closing the ort 23 and permitting the pressure'me him to pass from the to the valve cas ng and discharg-flylindm,

valve casing into the pi e25 and cylinder 5, means for supplying't e pressurekme'dium 'lhe reservoir 32, therefore,

and means for automatically operating the valve 22.

2. In an automatic pump, the combination of, the working cylinder 5 anditspiston 11, the discharge vcylinder 3 and its piston 4, a valve casing having a slide-valve therein and arranged at a right angle to the cylinders aforesaid, waste and supply pipes for controlling the supply of water passing to and from the working cylinder and in coopera tion with the slide-valve, a valve rod leading from the slide valve through a side of thefcylinder 5, a lever pivoted between its ends within the cylinder 5 and having one end operably connected with the valve rod, a piston rod extending from the piston 11, spaced members carried by the said piston rod and adapted to engage the other end of the above ment of piston 11 a wei hted arm projecting from the lever aforesai to carry it past the dead center when tilted by engagement of the members carried by the rod of piston 11,

and means forsupplying water under presslure. to the valve casing and discharge cylincer.

3. In an automatic hydraulic pump, the combination of a workin cylinder and a working piston therein, a ischarge cylinder and a discharge piston therein of smaller diameter than the working piston, and connected therewith, a waste pipe-leading from the working cylinder, means for supplying a .mentioned lever at intervals in the move I pressure medium to the working cylinder at one, side of the piston, Tme'ans for supplying that controls the supply of pressure medium to the first mentioned workin cylinder.

4. In an automatic hydrau ic ump, the combination of a main working cy inder and a working piston therein,- a discharge cylinder and a discharge piston therein 0 smaller diameter than the workin piston and connected therewith, an auxi iary working cylinder. having an auxiliary working piston therein'for actuatin the discharge piston and connected'with t e latter, a Waste outlet for the main working cylinder, means for supplying a pressure medium to the auxiliary wor ing cylmder and the discharge cylinder at the same sides of the pistons operating .therein, means for supplyinga pressure medium to the working cylinder at the opposite side of the. piston operating therein, and valve mechanism operable automatically in the movement of the Working pistons to alternately cut off the supply of the pressure medium from the mainand auxiliary WOIking cylinders for reversing the stroke of the pistons operating in the various cylinders.

5. In an automatic pump, the combination of a discharge cylinder and its piston, a

Working cylinder having its piston connected I with the discharge piston, main supply and discharge pi es, mechanism including an auxiliary wor ldng piston connected with the discharge piston and connected with pressure supplymeans, and automatic valved controlllng mechanismfor causing the pressure medium to act alternately upon one working piston in one direction and upon the other working piston and thedischarge piston the other direction.

6. In an automatic pump, the--combination of a discharge cylinder and-its piston, a working cylinder having its piston connected with the discharge piston, main supply and, discharge pipes, an auxiliary working cylinrelative to the waste an supply pipes of the 'der and piston secured to the discharge 0 linder, a piston rod connectin the auxi ary 2.5

7 Working piston and the disc arge piston, a

ran ed to control the passage of the pressure 35 me ium to and from the two Working cylinders, and automatic means operated by the pistons for reversing the osition of the valve Working cylinders.

In testimony WhereofI afiix my signature in'presence of two witnesses. V LAURITS AKSEL LAURSEN Witnesses:

" J-. EDMINSTER,

Roar- L; ZIMMERMAN; I 

